Thread-breaking device for spinning-machines



F Q. HARTIVIAN. THREAD BREAKING DEVICE FOR SPINNING MACHINES.

APPLICATION FILED MAY 31, 1918.

1,397,283. Patented Nov. 15, 1921.

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Specification of Letters Patent.

Patent-eel Nov. 15,1921.

Application filed May 31, 1918. Serial No. 237,600.

To all whom it may concern:

Be it known that I, FERDINAND Q. HART MAN, a citizen of the UnitedStates, and resident of Danville, in the county of Montour and State ofPennsylvania, have invented a new .and useful Improvement in Thread-Breaking Devices for Spinning-Machines, of which the following is aspecification.

This invention relates to a thread breaking device for spinningmachines, and more particularly to a thread breaking device which may beapplied to spinners for independently spinning a plurality of threadsand winding the threads so spun on a single spool, from which latter thethreads are subsequently to be twisted into one strand on a twistingmachine. It is quite essential in an operation of this kind, that asingle thread, or a less number than the whole number of threads beingwound, be not allowed to run onto the spool as if this occurred it wouldproduce a serious detect when the threads so spun were finally twistedinto a strand. 7

My present invention is directed to a thread breaking device which maybe interposed between the spindles and the take-up spool on which thespun threads are wound, and which shall be under the control of each oithe thread guide levers to perform its function of breaking a companionthread when another thread is unintentionally broken, so that theseveral threads may be united before any one or more of the threads hasor have been allowed to be wound-upon the take-up spoolwithout its ortheir companion thread orthreads.

The object of the invention is to provide a device of this characterwhich is relatively cheap and simple in construction while positive inaction.

Another object consists in providing such a device which has means forautomatically locking the thread breaking mechanism in inoperativeposition.

Another object. consists in providing such a device which has improvedmeans for guiding and tensioning the thread.

Another object consists in providing certain improvements in the :form,construction and arrangement of the several parts whereby the abovenamed and other objects may be elfectively attained.

A practical embodiment of my invention is represented in theaccompanying drawings in which,

F igure 1 represents a front elevation of the device in operativeposition, so much of the spinning machine being shown as will suffice todisclose a practical application of my invention.

Fig. 2 represents a side elevation of the parts shown in Fig. 1.

Fig. 3 represents a detail section, partly in elevatlon, of the threadbreaking device proper, parts being shown in different positlons in fulllines and dotted lines, and

Fig. 4 represents a detail section showing the means for attaching theguide eyes to the thread guide levers. l The main frame of the machineat one end is denoted by 1, the take-up spool by 2, the traverse guidefor assembling the threads and laying them on the take-up'spool, by 3,the wheel for driving the take-up spool by f4, and a pair of spindlesfor spinning two independent threads by 5 and 6.

The bobbins which carry the threads are mounted on the spindles 5, 6, inthe usual manner, and are indicated by 7, 8. The threads themselves aredenoted by 9, 10.

For the purpose of supporting the thread breaking mechanisms in properposition on the spinning machine so that there shall be one for eachgroup of threads to be combined on a single take-up spool, l secure acrossbar 11 to the end frames lot. the machine. This crossbar maybecomposed of wood so as to receive a .screw12 for attaching thebrackets containing the thread breaking mechanism in position.

Each bracket consists of a face plate 13 which has two forwardlyprojecting arms 14, 15, each of which arms has in turn a laterallyprojecting wing 16, 17. i

A pair of thread guide levers 18, 19, are pivoted in the lower part ofthe arms 14, 15, by a pintle 20.' This pintle is provided with a head atone end and, in order to prevent its unintentional withdrawal from thearms 14, 15, its other end has a circumferential groove in which a splitring 21 may be sprung to act as a nut.

The thread guide levers 18, 19, are provided with feet (one of which is,shown at 22. Figs. 2 and 3), which project rearwardly substantiallyatright angles to the main body portion of the said levers, andthebalance of the parts is such that the weight of the said feet 22causesthe levers to be under a normal tendency to swing or droprearwardly.

, of the guide eye is so bent as to leave a slight hump 24 at the endthereof; while the 7 end of the said bent-back portion of the guide eyeis bent at right angles, as shown at 24* (Fig. 4), in order to fit intoa corresponding recess at the mouth of the said opening in the lever; Asa result of this arrangement it will be seen that the guide eye is heldfirmly against accidental withdrawal from'the lever by the hump 24,while the bent end 24* prevents the guide eye from turning in'the lever.This arrangement is shown in Fig. 4, and it provides avery cheapconstruction and one in which the guide maybe removed and replaced witha minimumof labor when desired;

The thread, breaking mechanism proper consists of an arm 25 which ispivoted on the pintle 20 between the levers 18, 19, and

which has a weight 26 for over-balancing it so as to cause it tonormally rest in a substantiallyhorizontal position and out of the wayof the threads running from the bobbins 7, 8, asclearly shown in Fig. 2.In this positionthearm 25 impinges against the lower part of the faceplate 13 of the bracket. g

' The said arm 25 also has a pair of laterally extending lugs 27 whichare adapted to be engaged by a foot 22 of a thread guide lever 18, 19,when one of the latter falls or drops rearwardly, for the purpose ofoverbalancing the -arm 25 and swinging it,

1 against the resistance of its weight 26, into approximation to thethreads running from the bobbins 7, 8, as will be hereinafter described.p

The extremity of thearm 25 opposite the weight 26' is furnished withthread breaking mechanism which consists of a crosshead 28 provided witha thread catching coil 29 at each end thereof, This crosshead may becomposed of wire suitably bent and coiled into shape, and it mayconveniently be se cured to the arm 25 by bending it around earsv 30formed thereon. f Y

The device also includes combined guide H and tension elements whichhave coiled body portions '31 32,,and upwardly extending hook-shapedstemsv 33,34. These combined 7 gu de and ,tension elements may appro--;pr1ately,be composed of wire coiled andbent into proper shape, andthey are secured to the wings 16, 17, of thebracket by means of screws35, 36. It is intended that the thread shall be passed through one ormore of the coils of the body portions 31, 32, and then wound around thestems 33, 34, one or more times in order to give the desired tension,all as clearly shown in Figs. 1 and 2.

In order to hold the thread guide levers 18, 19, substantiallymotionless and out of engagement with the arm 25 during the spinning andwinding of the thread, a guide bar 37 is mounted in the wings 16, 17 ofthe bracket. This guide bar may be composed of wire and takes the formof a hairpin so as to provide, in 'efltect, a pair of rails extendingbetween the wings 16, 17, as clearly shown in Fig. 1. The location ofthis guide bar is such that, when the thread guide levers 18, 19, are inthread guiding position with their eyes 23 engaged by the threads 9, 10,the'said eyes will lie between the two rail members of the guide bar 37while the thread passes in front of the said members. It will beapparent that this arrangement tends to hold the lovers 18,19, snugly upagainst the guide bar '37 during the operation of the machine, while thesaid guide bar also imparts a slight additional tension to the threadowing to the balance of the guide levers 18, 19, which tends to causethem to fall rearwardly as already described.

Means is also provided for temporarily locking the thread breaking arm25 in its withdrawn or inoperative position, clearly shown in Fig. 3.This means includes a shaft 38 which is journaled in the rear part ofthe arms 14, '15, of the bracket. A detent 39 is fixed to the shaft 38by a set screw 40, and a handle 41 is formed by bending one end of theshaft 38. In order to lock the thread breaking arm 25 in inoperativeposition as mentioned, it is simply necessary to turn the handle 41, andhence the shaft 38 and detent carried thereby, into position so that theextremity of the detent engages the adjacent extremity of the'weight 26,as

shown in dotted lines in Fig. 3. When the parts are in this position,the thread may be disengaged from either or both of-the guide levers 18,19, andthe latter be permitted to contact with the lugs 27 on the arm25without forcing the latter into juxtaposition with the thread.

In operation the thread which comes from the bobbins 7, 8, is passedthrough the coils 31, 32, and around the stems 33, 34, of the combinedguide and tension elements, thence thronghlthe eyes,23"'and thence overthe traverse guide, 3 and onto the spool 2. If, during theoperation ofthe machine, one of the threads 9, 10, accidentally breaks, the guidelever with which it is engaged will at oncedrop back so that its footcontacts with V a lug 27 on the arm 25 and thereby overbalances thelatter against its weight 26 so as to cause itto swing down intothepositionshown in full lines in Fig. 3, in which position one of itscoils 29 will at once be engaged by the unbroken thread whirling about,whereby the said thread will be broken and thus prevent a length ofsingle thread from being wound upon the spool, 2,

The subject matter of my co-pending applications, Serial. Nos. 373,748,373,749, 373,7 50, filed April 14th, 1920, is shown and described butnot claimed herein.

It will be understood that various changes may be resorted to in theform, construction and arrangement of the several parts with outdeparting from the spirit and scope of my invention, and hence I do notintend to be limited to the details herein shown and described except asthey may be specifically included in the claims.

What I claim is: p

l. A thread breaking device for spinning machines in which severalthreads are independently spun and wound on a single takeup spool,comprising thread guide levers each pivoted in position to drop when itsthread breaks, a counterbalanced thread breaker pivoted to swing intoposition to break a thread, the said breaker being located in positionto be thrown oficenter by the dropping of a thread guide lever, andmeans for temporarily locking the said breaker in inoperative position,said means comprising a detent secured to a shaft journaled in thedevice.

2. A thread breaking device for spinning machines in which severalthreads are independently spun and wound on a single takes carried bysaid lever, and a break a thread, the said breaker being located inposition to be thrown off center by the dropping of a thread guidelever, and manually controlled means for temporarily locking the saidbreaker in inoperative position, said means comprising a detent securedto a shaft journaled in the device and a handle for rocking the shaftand detent.

3. In a device of the character described, a thread guide lever pivotedand balanced and arranged to move in a vertical plane and to have anormal tendency to drop away from thread guiding position, a guide eyeide bar having a slot through which said eye is fitted to project whenthe lever is in thread guiding position, whereby the lever will be heldsubstantially motionless and in thread guiding position while the threadis intact and when broken the lever will automatically move the guideeye out ofthe slot.

4. In a device of the character described, a thread guide lever pivotedand balanced and arranged to move in a vertical plane and to have anormal tendency to drop away from thread guiding position, a guide eyecarried by said lever, and a guide bar having a pair of horizontallydisposed rails be tween which said eye is fitted to project when thelever is in thread guiding position, where-- by the lever will be heldsubstantially motionless and in thread guiding position while the threadis intact and when broken the lever will automatically move the guideeye out from between the rails.

In testimony, that I claim the foregoing as my invention, I have signedmy name, this 13th day of May, 1918.

FERDINAND Q. HARTMAN.

